AN4170

PCB layout

Doc ID 023709 Rev 1

11/15

2.2.3

Layout recommendations

The following figures illustrate layout recommendations.

(recommended distance to be within 3 mm) in order to avoid spikes generated by the stray

inductance caused by the copper supply lines.

Figure 12.

Solder the snubber networks as close as possible to the IC related pin.

A voltage spike dangerous for device operation could occur if the snubber network is far

from the output pins. It is recommended that the distance between the snubber network and

the output pins be within 5 mm.

Figure 13.

Snubber networks soldered as close as possible to relevant IC pin

Ground pin and VCC pin of 100nF

capacitor should be directly

connected to the related IC pin